Electrical bus system



E F I III Nov. 28, 1939. .1 M. MEIJER ELECTRICAL BUS SYSTEM Fild oct. 4, 1958 Patented Nov. '28, 1939 UNITED STATE/s PATENT oFFlcE ELECTRICAL BUS SYSTEM Jacob M. Melzer, Southwest Greensburg, Pa., as-

signor to Railway and Industrial Engineering Company, Greensburg, Pa., a corporation of Delaware Application october 4, 193s, serial No. 233,317 5 Claims. (Cl. 174-99) This invention relates to electrical bus systems port fOr the endS f the duet-forming plates l. 8. and particularly to bus systems in which each The plates l, 3- are Semi-Cylindrical With One bus or conductor is separately enclosed in a non- Set 0f flanged edges 9, l0, respectively, that er1- magnetic duct or housing, gage to anchor the plates to each other and a 5 It has been proposed, as described and claimed SeCOnd Set 0f reverSely bent flanges il for re- 5 in the copending application of Harold H. Rudd, Ceivns Clamp bolts l2 by which the plates are Electrical bus systems, Serial No. 167,639, filed Clalnped t0 each Other and t0 the liange members October 6, 1937, to support each bus and its hous- 2, 5- The duet thus formed iS not airtight aS ing by annular insulator frames which each carry the flanges li Cannot be drawn tightly t0 each a plurality of radially disposed insulators and other and also securely anchored to the frames 10 which have annular flanges for supporting the when they are made with the usual manufacturplates forming the bus duct. The present invening tolerancestion relates to constructions of that general type. The illustrated buS iS 0f the quadruple Cable An object of the invention is to provide entype, the cable I3 being carried in matins notches closed bus Systems of sliipler and less expensive in the insulator blOCkS I4 that are mOllllted 0n l5 design for use where the maximum mechanical the section I of the base by bolts i5. Other types protection against damage from high short cirof bus members, such as the tubular, plate or cuit stresses is not essential. An object is to prochannel types, may be supported from the bases vide an enclosed bus system in which the bus supby insulator constructions such as shown in Fig. 3.

ports comprise bases having flanges conforming The insulator base of Fig. 3 includes a central 20 to sectors of a cylinder, and straps or bands are pillar section I6 having an attaching ilange il secured to the bases to complete annular ilanges and a lateral sector-shaped flange i8 for receivfor supporting the duct plates. An object is to ing the strap 5. The cylindrical insulator I9 is provide a bus system including ring frames for secured to the base by cement or die metal in carrying the duct plates, each frame including a the usual manner and carries the metal head 20 25 base for attachment to a support, and a strap or to which the base member 2l of the bus clamp band secured to the base; the bus being supported iS bOlted. rThe upper member 22 iS Secured t0 the by the base. More speciilcally, an object is to lower clamp member by bolts 23. The illustrated provide a bus system including supporting bases clamps are shaped to receive a bare or taped bus which each .carry an insulator and have a flange of tubular form but may be given other shapes 30 forming a sector of a cylinder, straps secured to in accordance with the design of the bus members the bases to complete the cylindrical surface of of the particular installation. an annular frame, and duct-forming plates The base members, straps and duct plates are clamped to the annular frames. non-magnetic. The frames may be of cast These and other objects and advantages of the bronze or aluminum, and the Straps and duet 35 invention will be apparent from the following plates may be 0f non-magnetic steel or aluminum. specification when taken with the accompanying The straps of the frames are not subjected to drawing in which: stresses by short circuit current surges and may Fig. 1 is an end elevation of one embodiment of therefore be relatively light or flexible and, in

the bus support and housing contemplated by this general, of a thickness comparable to that of the o invention; duct plates. The cylindrical duct form affords a Fig. 2 is a fragmentary central section, with relatively rigid structure from thinl straps and paltS SliOvVn 1n elevation, df the Same; and plates since the pressure applied by clamps l2 Flg- 1S an end elevatlon 0f another form 0f tends to preserve the normal cylindrical shape of supporting structure. the duci, 45

In the drawing, the reference numeral I identi- 1i; is to be understood that there is considerable nes the interior or insulator supporting vsection latitude in the design of bus systems soi; fori-,h Of a frame having Sector-Shaped Cylindrical in the following claims, and that the invention llangeS 2 and legs 3 fOr Securing the baSe t0 a is not restricted to the specific constructions heresupport. The ends 4 of the ilanges are notched in shown and described,

,to form seats for the ends of the strap or band 5 I claim;

that is secured to the ilange ends 4 by bolts 6. The 1. 1n an electrical bus system, a bus, insulator Strap 5 iS relatively thin and itS Outer Surface means carrying said bus, a base supporting said merges inte that 0f the flanges 2 and cooperates insulator means and having a flange conforming with the flanges 2 t0 form a ring 0r annular Sup to a sector of a cylindrical surface, a strap se- 55 cured to said flange to complete the cylindrical surface, and duct plates clamped to each other and to said cylindrical surface to form a duct enclosing said bus.

2. In an electrical bus system, a base member having a flange for attachment to a support and a flange conforming to a sector of a cylindrical surface, the ends of saidsector-shaped iiange being notched, a strap having its ends seated in said notches and cooperating with said sectorshaped ange to dene a cylindrical surface, insulator means secured to said base, a bus supported by said insulator means, duct plates, and means clamping said duct plates to each other and to said cylindrical surface.

3. 'Ihe invention as claimed in claim 2, wherein said insulator means comprises a. plurality of insulator members.

4 The invention as claimed in claim 2, wherein said insulator means consists of a cylindrical insulator, in combination with clamps carried by said insulator to support a bus.

5. In an enclosed bus system, a cast base member having a ange-conforming to a sector of a cylindrical surface, insulator means on said base, a. bus carried by said insulator means, and a exible strap secured to said base and cooperating with said flange to provide a cylindrical surface to which plates may be secured to form a duct enclosing said bus.

v JACOB M. MELZER. 

